<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
	"http://www.w3.org/TR/html4/strict.dtd">
<html lang="en-US">
<head>
	<title></title>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<style type="text/css">
	body { font-family: "MarkA"; }
	</style>
</head>
<body>

<div id="t" style="visibility:hidden; width: -moz-fit-content">ABC</div>
<script>
  document.body.offsetWidth;
  var n = document.getElementById("t");
  var w = document.defaultView.getComputedStyle(n, "").width;
  var h = document.defaultView.getComputedStyle(n, "").height;
  var d = document.createElement("div");
  d.style.width = w;
  d.style.height = h;
  d.style.backgroundColor = "green";
  n.parentNode.removeChild(n);
  document.body.appendChild(d);
</script>
</body>
</html>
